[Tn, Tn.pr, Dn.f] ~ sb (of/about sth) give sb knowledge (of sth); tell sb 通知或报告某人（某事）; 告诉某人: `Some money is missing.' `Have you informed the police?' ‘有些钱不见了.’‘你报告警方了吗?’ * Keep me informed (of/about what happens). 有事随时通知我. * inform oneself of the facts, ie find out all that needs to be known 使自己了解事实 * He informed the police that some money was missing. 他向警方报案说有些钱不见了. 
[Ipr] ~ against/on sb (law 律) give evidence or make an accusation against sb (to the police) （向警方）告发或检举某人: One of the criminals informed against/on the rest of the gang. 有一罪犯告发了同党. 
[Tn] (fml 文) give (sth) its essential features; pervade 赋予（某事物）其特徵; 贯穿; 遍及: the sense of justice which informs all her writings 体现在她所有写作中的那种正义感.> informant / -Ent; -Ent/ n
1 person who gives information 提供消息或情报的人: The journalist did not want to reveal the identity of his informant. 那个新闻工作者不想透露消息提供人的身分.
2 (linguistics 语言) native speaker of a language who helps a scholar make an analysis of the language 发音合作人（为语言学者分析语言提供资料的说本地话的人）.
informed adj having or showing knowledge 有知识的; 见闻广的; 了解情况的: an informed critic, member of the public, etc 掌握情况的评论家﹑ 公众等 * informed criticism 有见地的批评 * an informed guess, ie based on some knowledge 有根据的猜测.
informer n person who informs, esp against a criminal or fugitive 告密者, 告发者, 检举人（尤指告发罪犯或逃犯的）.